/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:22:45,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:22:45,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:22:45,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:22:45,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:22:45,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:22:45,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:22:45,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:22:45,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:22:45,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:22:45,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:22:45,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:22:45,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:22:45,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:22:45,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:22:45,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:22:45,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:22:45,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:22:45,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:22:45,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:22:45,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:22:45,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:22:45,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:22:45,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:22:45,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:22:45,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:22:45,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:22:45,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:22:45,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:22:45,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:22:45,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:22:45,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:22:45,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:22:45,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:22:45,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:22:45,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:22:45,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:22:45,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:22:45,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:22:45,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:22:45,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:22:45,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:22:45,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:22:45,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:22:45,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:22:45,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:22:45,252 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:22:45,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:22:45,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:22:45,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:22:45,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:22:45,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:22:45,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:22:45,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:22:45,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:22:45,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:22:45,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:22:45,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:22:45,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:22:45,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:22:45,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:22:45,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:22:45,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:22:45,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:45,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:22:45,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:22:45,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:22:45,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:22:45,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:22:45,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:22:45,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:22:45,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:22:45,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:22:45,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:22:45,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:22:45,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:22:45,666 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:22:45,667 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2020-10-13 23:22:45,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5611072/4cc341d829664204a4132e21a7156030/FLAG8268a4a04 [2020-10-13 23:22:46,239 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:22:46,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2020-10-13 23:22:46,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5611072/4cc341d829664204a4132e21a7156030/FLAG8268a4a04 [2020-10-13 23:22:46,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5611072/4cc341d829664204a4132e21a7156030 [2020-10-13 23:22:46,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:22:46,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:22:46,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:46,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:22:46,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:22:46,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:46" (1/1) ... [2020-10-13 23:22:46,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@678b2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:46, skipping insertion in model container [2020-10-13 23:22:46,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:22:46" (1/1) ... [2020-10-13 23:22:46,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:22:46,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:22:46,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:46,877 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:22:46,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:22:47,021 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:22:47,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47 WrapperNode [2020-10-13 23:22:47,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:22:47,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:22:47,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:22:47,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:22:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... [2020-10-13 23:22:47,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:22:47,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:22:47,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:22:47,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:22:47,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:22:47,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:22:47,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:22:47,145 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:22:47,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:22:47,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:22:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:22:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:22:47,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:22:47,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:22:47,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-13 23:22:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:22:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:22:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:22:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:22:47,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:22:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:22:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:22:47,517 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:22:47,518 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-13 23:22:47,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:47 BoogieIcfgContainer [2020-10-13 23:22:47,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:22:47,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:22:47,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:22:47,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:22:47,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:22:46" (1/3) ... [2020-10-13 23:22:47,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f03a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:47, skipping insertion in model container [2020-10-13 23:22:47,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:22:47" (2/3) ... [2020-10-13 23:22:47,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48f03a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:22:47, skipping insertion in model container [2020-10-13 23:22:47,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:22:47" (3/3) ... [2020-10-13 23:22:47,532 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2020-10-13 23:22:47,544 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:22:47,552 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:22:47,583 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:22:47,613 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:22:47,614 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:22:47,614 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:22:47,614 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:22:47,614 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:22:47,614 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:22:47,615 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:22:47,615 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:22:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states. [2020-10-13 23:22:47,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:22:47,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:47,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:47,644 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1396756151, now seen corresponding path program 1 times [2020-10-13 23:22:47,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:47,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389316447] [2020-10-13 23:22:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:47,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:47,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:48,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:49,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:22:52,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:22:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:22:52,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:22:52,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 23:22:52,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:52,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:52,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:52,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:52,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:22:52,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:52,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:52,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:52,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:52,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:52,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389316447] [2020-10-13 23:22:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:22:52,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391392309] [2020-10-13 23:22:53,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:22:53,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:53,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:22:53,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:53,039 INFO L87 Difference]: Start difference. First operand 52 states. Second operand 3 states. [2020-10-13 23:22:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:53,321 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2020-10-13 23:22:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:22:53,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-13 23:22:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:53,340 INFO L225 Difference]: With dead ends: 95 [2020-10-13 23:22:53,340 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:22:53,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:22:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:22:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 23:22:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:22:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2020-10-13 23:22:53,406 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32 [2020-10-13 23:22:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:53,406 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2020-10-13 23:22:53,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:22:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2020-10-13 23:22:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 23:22:53,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:53,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:53,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:22:53,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1123092955, now seen corresponding path program 1 times [2020-10-13 23:22:53,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:53,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264381763] [2020-10-13 23:22:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:53,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:54,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:58,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 23:22:58,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 23:22:58,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:22:58,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:58,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:58,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:22:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:58,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:22:58,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:58,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:58,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:58,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:58,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:22:58,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:58,485 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:58,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:58,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:58,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:22:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:22:58,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264381763] [2020-10-13 23:22:58,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:22:58,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:22:58,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34536255] [2020-10-13 23:22:58,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:22:58,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:22:58,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:58,502 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 4 states. [2020-10-13 23:22:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:58,691 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2020-10-13 23:22:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:22:58,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-13 23:22:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:58,693 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:22:58,693 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 23:22:58,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:22:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 23:22:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-13 23:22:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 23:22:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2020-10-13 23:22:58,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 32 [2020-10-13 23:22:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:58,712 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2020-10-13 23:22:58,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:22:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2020-10-13 23:22:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 23:22:58,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:58,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:58,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:22:58,715 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1903477091, now seen corresponding path program 1 times [2020-10-13 23:22:58,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:58,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418093026] [2020-10-13 23:22:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:58,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:58,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:59,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:01,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:03,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 23:23:03,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:23:03,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:23:03,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:03,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 23:23:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:23:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:03,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:03,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:03,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:03,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:03,786 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:03,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:23:03,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418093026] [2020-10-13 23:23:03,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:23:03,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:23:03,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867438025] [2020-10-13 23:23:03,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:03,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:03,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:03,796 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 5 states. [2020-10-13 23:23:04,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:04,029 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2020-10-13 23:23:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:23:04,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-10-13 23:23:04,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:04,031 INFO L225 Difference]: With dead ends: 97 [2020-10-13 23:23:04,031 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:23:04,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:23:04,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:23:04,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-13 23:23:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 23:23:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-13 23:23:04,043 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 34 [2020-10-13 23:23:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:04,043 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-13 23:23:04,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-13 23:23:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:23:04,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:04,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:04,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:23:04,046 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1916053391, now seen corresponding path program 1 times [2020-10-13 23:23:04,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:04,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405290580] [2020-10-13 23:23:04,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:04,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:04,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:09,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:23:09,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:23:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:23:09,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:09,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:23:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:09,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:23:09,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:09,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:09,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:09,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:09,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:23:09,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:09,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:09,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:09,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 23:23:09,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405290580] [2020-10-13 23:23:09,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:09,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:23:09,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913226307] [2020-10-13 23:23:09,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:23:09,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:23:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:23:09,158 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-10-13 23:23:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:09,485 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-10-13 23:23:09,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:23:09,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-13 23:23:09,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:09,487 INFO L225 Difference]: With dead ends: 116 [2020-10-13 23:23:09,488 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:23:09,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:23:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:23:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-13 23:23:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-13 23:23:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-13 23:23:09,498 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 54 [2020-10-13 23:23:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:09,499 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-13 23:23:09,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:23:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-13 23:23:09,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:23:09,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:09,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:09,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:23:09,502 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:09,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1408135099, now seen corresponding path program 2 times [2020-10-13 23:23:09,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:09,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503522811] [2020-10-13 23:23:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:10,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:13,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:23:14,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:14,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5200 [2020-10-13 23:23:14,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:23:14,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:14,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:23:14,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:14,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:14,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:14,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:14,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:14,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:23:14,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:14,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:14,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:14,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:14,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:14,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-13 23:23:14,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503522811] [2020-10-13 23:23:14,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:14,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:23:14,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518946771] [2020-10-13 23:23:14,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:23:14,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:14,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:23:14,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:14,809 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 5 states. [2020-10-13 23:23:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:15,009 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-13 23:23:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:23:15,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-13 23:23:15,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:15,012 INFO L225 Difference]: With dead ends: 142 [2020-10-13 23:23:15,012 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:23:15,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:23:15,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:23:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-13 23:23:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 23:23:15,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-13 23:23:15,040 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2020-10-13 23:23:15,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:15,045 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-13 23:23:15,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:23:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-13 23:23:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 23:23:15,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:15,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:15,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:23:15,051 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:15,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:15,052 INFO L82 PathProgramCache]: Analyzing trace with hash 582962553, now seen corresponding path program 3 times [2020-10-13 23:23:15,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:15,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183035753] [2020-10-13 23:23:15,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:15,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:15,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:18,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:20,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 23:23:20,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:23:20,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5376 [2020-10-13 23:23:20,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:20,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-13 23:23:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 23:23:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:24,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:24,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:24,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:24,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:24,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 23:23:24,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:24,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:24,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:24,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:23:24,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183035753] [2020-10-13 23:23:24,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:24,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 23:23:24,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807346991] [2020-10-13 23:23:24,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 23:23:24,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 23:23:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 23:23:24,857 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 48 states. [2020-10-13 23:23:26,037 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-13 23:23:27,431 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2020-10-13 23:23:29,006 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 23:23:29,949 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-13 23:23:33,078 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 23:23:33,867 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-13 23:23:34,579 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 23:23:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:35,473 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2020-10-13 23:23:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 23:23:35,474 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 76 [2020-10-13 23:23:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:35,482 INFO L225 Difference]: With dead ends: 208 [2020-10-13 23:23:35,482 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 23:23:35,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=376, Invalid=6430, Unknown=0, NotChecked=0, Total=6806 [2020-10-13 23:23:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 23:23:35,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2020-10-13 23:23:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 23:23:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 192 transitions. [2020-10-13 23:23:35,535 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 192 transitions. Word has length 76 [2020-10-13 23:23:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:35,536 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 192 transitions. [2020-10-13 23:23:35,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 23:23:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 192 transitions. [2020-10-13 23:23:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:23:35,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:35,541 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:35,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:23:35,542 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:35,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1612983625, now seen corresponding path program 4 times [2020-10-13 23:23:35,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:35,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211711307] [2020-10-13 23:23:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:35,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:35,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:37,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:40,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:23:40,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:40,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 23:23:40,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:40,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:40,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:40,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:23:40,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:40,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:40,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:40,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:40,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:40,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:23:40,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211711307] [2020-10-13 23:23:40,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:40,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:40,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826029865] [2020-10-13 23:23:40,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:40,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:40,670 INFO L87 Difference]: Start difference. First operand 164 states and 192 transitions. Second operand 10 states. [2020-10-13 23:23:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:41,177 INFO L93 Difference]: Finished difference Result 264 states and 307 transitions. [2020-10-13 23:23:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:23:41,178 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-13 23:23:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:41,180 INFO L225 Difference]: With dead ends: 264 [2020-10-13 23:23:41,180 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 23:23:41,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:23:41,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 23:23:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 23:23:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 23:23:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-13 23:23:41,220 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 78 [2020-10-13 23:23:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:41,221 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-13 23:23:41,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-13 23:23:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 23:23:41,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:41,226 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:41,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:23:41,227 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:41,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:41,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2133871689, now seen corresponding path program 5 times [2020-10-13 23:23:41,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:41,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984228854] [2020-10-13 23:23:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:41,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:42,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:46,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:46,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 23:23:46,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:23:46,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:23:46,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:46,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:46,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:23:46,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:46,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:23:46,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:46,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:23:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:46,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:46,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:46,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:23:46,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:23:46,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:23:46,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:46,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:23:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:23:46,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:23:46,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:23:46,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:23:46,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984228854] [2020-10-13 23:23:46,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:23:46,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:23:46,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412317651] [2020-10-13 23:23:46,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:23:46,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:23:46,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:23:46,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:23:46,349 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 10 states. [2020-10-13 23:23:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:23:46,803 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2020-10-13 23:23:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:23:46,804 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-13 23:23:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:23:46,805 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:23:46,806 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 23:23:46,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:23:46,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 23:23:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-13 23:23:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:23:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-13 23:23:46,818 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 78 [2020-10-13 23:23:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:23:46,818 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-13 23:23:46,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:23:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-13 23:23:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 23:23:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:23:46,820 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:23:46,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:23:46,820 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:23:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:23:46,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1686861853, now seen corresponding path program 6 times [2020-10-13 23:23:46,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:23:46,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335023936] [2020-10-13 23:23:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:23:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:23:47,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:50,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:23:51,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:23:51,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 23:23:51,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:23:51,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:23:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:23:51,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:23:51,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-13 23:23:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:23:51,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 23:23:51,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:23:54,429 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-13 23:23:54,809 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 23:23:55,010 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-13 23:23:55,218 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 23:23:55,441 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2020-10-13 23:23:56,448 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-13 23:23:57,230 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-13 23:23:57,521 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-10-13 23:24:03,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:03,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:03,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:03,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:03,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:03,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:24:03,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:03,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:03,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:03,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:03,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:03,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:24:03,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335023936] [2020-10-13 23:24:03,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:03,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-13 23:24:03,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106815622] [2020-10-13 23:24:03,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-13 23:24:03,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-13 23:24:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2020-10-13 23:24:03,189 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 71 states. [2020-10-13 23:24:03,491 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 9 [2020-10-13 23:24:03,929 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 20 [2020-10-13 23:24:05,225 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-13 23:24:06,058 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-10-13 23:24:06,365 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-13 23:24:06,639 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-13 23:24:06,843 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 23:24:07,124 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-13 23:24:07,425 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-13 23:24:07,729 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-13 23:24:08,017 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-13 23:24:08,375 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-13 23:24:08,735 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-13 23:24:09,003 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-13 23:24:09,343 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-13 23:24:09,632 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-13 23:24:09,987 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-13 23:24:10,546 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-13 23:24:11,040 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2020-10-13 23:24:11,305 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-13 23:24:11,583 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-13 23:24:11,875 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-13 23:24:12,192 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-13 23:24:12,521 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-13 23:24:12,818 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-13 23:24:13,138 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-13 23:24:13,546 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-13 23:24:13,866 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2020-10-13 23:24:14,534 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-13 23:24:14,841 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 23:24:15,235 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-13 23:24:15,542 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 23:24:15,913 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-13 23:24:16,273 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 23:24:16,576 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-10-13 23:24:16,882 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-13 23:24:17,174 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-13 23:24:17,961 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-13 23:24:18,390 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-13 23:24:18,914 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-13 23:24:19,373 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-13 23:24:19,966 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-13 23:24:20,379 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-13 23:24:20,989 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-13 23:24:21,497 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 23:24:21,942 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-13 23:24:22,729 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-13 23:24:23,087 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-13 23:24:23,424 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-13 23:24:23,797 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-13 23:24:24,106 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 23:24:24,368 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2020-10-13 23:24:24,879 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-13 23:24:26,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:26,307 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2020-10-13 23:24:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-13 23:24:26,309 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 98 [2020-10-13 23:24:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:26,313 INFO L225 Difference]: With dead ends: 201 [2020-10-13 23:24:26,313 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 23:24:26,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=861, Invalid=18879, Unknown=0, NotChecked=0, Total=19740 [2020-10-13 23:24:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 23:24:26,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 168. [2020-10-13 23:24:26,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 23:24:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 187 transitions. [2020-10-13 23:24:26,380 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 187 transitions. Word has length 98 [2020-10-13 23:24:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:26,381 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 187 transitions. [2020-10-13 23:24:26,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-13 23:24:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 187 transitions. [2020-10-13 23:24:26,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:24:26,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:26,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:26,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:24:26,392 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash -465843551, now seen corresponding path program 7 times [2020-10-13 23:24:26,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:26,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580011902] [2020-10-13 23:24:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:26,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:26,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:28,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:31,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:24:31,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:24:31,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:24:31,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:31,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:31,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:31,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:24:31,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:31,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:31,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:31,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:31,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:31,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:31,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:24:31,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:31,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:31,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:31,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:24:31,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580011902] [2020-10-13 23:24:31,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:31,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:31,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791361402] [2020-10-13 23:24:31,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:31,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:31,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:31,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:31,623 INFO L87 Difference]: Start difference. First operand 168 states and 187 transitions. Second operand 12 states. [2020-10-13 23:24:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:32,687 INFO L93 Difference]: Finished difference Result 253 states and 281 transitions. [2020-10-13 23:24:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:24:32,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-10-13 23:24:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:32,689 INFO L225 Difference]: With dead ends: 253 [2020-10-13 23:24:32,689 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 23:24:32,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 23:24:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-13 23:24:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:24:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-10-13 23:24:32,700 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 100 [2020-10-13 23:24:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:32,700 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-10-13 23:24:32,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-10-13 23:24:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:24:32,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:32,702 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:32,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:24:32,702 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:32,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash -929592415, now seen corresponding path program 8 times [2020-10-13 23:24:32,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:32,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459677388] [2020-10-13 23:24:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:35,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:37,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:37,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:37,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:24:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:37,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 23:24:37,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:37,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:24:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:37,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:37,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:37,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:24:37,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:24:37,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:24:37,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:37,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:24:37,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:24:37,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:24:37,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:24:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 23:24:37,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459677388] [2020-10-13 23:24:37,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:24:37,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:24:37,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910918665] [2020-10-13 23:24:37,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:24:37,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:24:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:24:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:24:37,901 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 12 states. [2020-10-13 23:24:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:24:38,747 INFO L93 Difference]: Finished difference Result 198 states and 226 transitions. [2020-10-13 23:24:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:24:38,749 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-10-13 23:24:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:24:38,750 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:24:38,751 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 23:24:38,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:24:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 23:24:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 23:24:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 23:24:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-13 23:24:38,763 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 100 [2020-10-13 23:24:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:24:38,763 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-13 23:24:38,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:24:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-13 23:24:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:24:38,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:24:38,765 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:24:38,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:24:38,765 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:24:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:24:38,766 INFO L82 PathProgramCache]: Analyzing trace with hash -249432371, now seen corresponding path program 9 times [2020-10-13 23:24:38,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:24:38,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316897416] [2020-10-13 23:24:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:24:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:24:38,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:41,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:24:43,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:24:43,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:24:43,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:24:43,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:24:43,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:24:43,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:24:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-13 23:24:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:24:43,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 23:24:43,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:24:46,543 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-13 23:24:47,281 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-13 23:24:47,493 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 23:24:47,718 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 23:24:47,968 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-13 23:24:48,241 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-13 23:24:48,514 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-13 23:24:48,766 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 23:24:49,015 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-10-13 23:24:49,277 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-13 23:24:49,560 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 23:24:49,855 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 23:24:50,131 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-13 23:24:50,404 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 23:24:50,684 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-13 23:24:50,937 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-13 23:24:51,228 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 23:24:51,547 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-13 23:24:51,860 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-13 23:24:52,172 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 23:24:52,603 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-13 23:24:52,983 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 23:24:53,320 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-10-13 23:24:53,650 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-13 23:24:53,961 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-13 23:24:54,291 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-13 23:24:54,670 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-13 23:24:55,029 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-13 23:24:55,392 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 23:24:55,730 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 23:24:56,034 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-13 23:24:56,567 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-13 23:24:56,912 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-13 23:24:57,298 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-13 23:24:57,628 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-13 23:24:57,967 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 23:24:58,353 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-13 23:24:59,088 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-13 23:24:59,463 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-13 23:24:59,835 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-13 23:25:00,243 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-13 23:25:00,624 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-13 23:25:01,004 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-13 23:25:01,543 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-13 23:25:01,930 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-13 23:25:02,297 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-13 23:25:02,631 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 23:25:07,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:25:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:25:07,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:25:07,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:25:07,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:25:07,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:25:07,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:25:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:25:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:25:07,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316897416] [2020-10-13 23:25:07,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:25:07,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-13 23:25:07,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453228016] [2020-10-13 23:25:07,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-13 23:25:07,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:25:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-13 23:25:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=7217, Unknown=0, NotChecked=0, Total=7832 [2020-10-13 23:25:07,352 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 89 states. [2020-10-13 23:25:10,182 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2020-10-13 23:25:10,768 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2020-10-13 23:25:11,476 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2020-10-13 23:25:12,366 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-13 23:25:13,221 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-13 23:25:14,343 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 91 [2020-10-13 23:25:14,878 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-13 23:25:15,202 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-10-13 23:25:15,885 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-13 23:25:16,816 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 23:25:17,344 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-13 23:25:18,086 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-13 23:25:18,449 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-10-13 23:25:19,087 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-13 23:25:19,565 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 23:25:20,007 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-10-13 23:25:20,717 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 23:25:21,311 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-10-13 23:25:21,931 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 23:25:22,557 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-13 23:25:23,087 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-13 23:25:23,997 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-13 23:25:24,766 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 53 [2020-10-13 23:25:25,869 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 63 [2020-10-13 23:25:26,417 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-10-13 23:25:27,616 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2020-10-13 23:25:28,598 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 52 [2020-10-13 23:25:29,843 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 63 [2020-10-13 23:25:30,910 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 93 [2020-10-13 23:25:31,860 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2020-10-13 23:25:32,570 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 30 [2020-10-13 23:25:33,749 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 60 [2020-10-13 23:25:34,458 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-10-13 23:25:35,084 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-13 23:25:35,751 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 33 [2020-10-13 23:25:36,629 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 60 [2020-10-13 23:25:37,341 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-10-13 23:25:38,325 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-13 23:25:38,910 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-13 23:25:39,609 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-13 23:25:40,569 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-13 23:25:41,529 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-13 23:25:42,105 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-13 23:25:42,927 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-10-13 23:25:43,842 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-13 23:25:44,323 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-10-13 23:25:44,832 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-10-13 23:25:45,380 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 32 [2020-10-13 23:25:46,096 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 35 [2020-10-13 23:25:46,715 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2020-10-13 23:25:49,414 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 97 [2020-10-13 23:25:51,147 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2020-10-13 23:25:52,582 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 88 [2020-10-13 23:25:54,927 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-10-13 23:25:56,644 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 23:26:13,383 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-13 23:26:14,631 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-13 23:26:15,402 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-13 23:26:16,136 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-13 23:26:16,787 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-13 23:26:17,672 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-13 23:26:18,311 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-13 23:26:18,890 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 23:26:19,678 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2020-10-13 23:26:20,870 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-13 23:26:21,398 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 23:26:22,183 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-13 23:26:22,922 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-13 23:26:23,515 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-13 23:26:24,609 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-13 23:26:25,042 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-13 23:26:25,877 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-13 23:26:26,741 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-10-13 23:26:28,024 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-10-13 23:26:29,414 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 70 [2020-10-13 23:26:29,846 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 67